Comparison of photocell and stopwatch time in a 20 meter sprint: A case study of a non-trained analyst
Keywords:Photocells, stopwatch, sprint, methods, reliability
The purpose of the study. Running speed represents a global marker of individual performance and provides a simple method of objective measurement of motor performance for use in clinical and research environments. Speed is most often at relatively short distances at normal or fast pace, using methods of obtaining manual time (e.g., stopwatch) or automated (e.g., photocells).
Materials and methods. The sample consisted of 25 students, 12 males and 13 females, all 13 years old and walked a course 20 meters away, we used to obtain the time elapsed the time, and the method by photocells. The agreement was examined using Bland and Altman graphs and linear regression.
Results. There are significant and strong differences between the evaluation methods (T =14,205; p<0,001) and there is a significant and strong correlation between the variables (r = 0.902; p<0.001).
Conclusions. This study suggests that for measurement in research context or in sports aimed at high yield it is advisable to use photocell, and the use of the timing method for recreational use.
Alcaraz, PE, Palao, JM, Elvira, JL, & Linthorne N (2008). Effects of three types of resisted sprint training devices on the kinematics of sprinting at maximum velocity. The Journal of Strength & Conditioning Research , 22 (3), 890-897.
Almeida, M. B (2017). Validity and reliability of the use of stopwatches and video analysis to evaluate the time of the Line Drill Test. Andaluza de Medicina del Deporte, 11 (3), 13.
Cancian, L. (2013). Validation of a 50-meter back-and-go test to measure anaebic anaebic capacity in soccer players. The Source - UFSM Digital Repository, 43-44.
Cardemil, F. (2017). Comparison analysis and applications of the Bland-Altman method: correlation or agreement? Medwave, 17(1), e6852.
Cronin, J. G. (2007). Effect of starting stance on initial sprint performance. Journal of Strength and Conditioning Research , 21 (3), 990.
Cronin, JB, Templeton, & RL . (2008). Timing light height affects sprint times. The Journal of Strength & Conditioning Research, 22 (1), 318-320.
Cronin, Jonh B, Templeton, & Rebecca L. (2008). Stepping backward can improve sprint performance over short distances. The Journal of Strength & Conditioning Research , 22 (3), 918-922.
Currell, K. &. (2008). Validity, reliability and sensitivity of sports performance measures. Sports medicine, 297-319.
Gama, A. (2015). Visual support of the spectrographic tracing: impact on the reliability of auditory-perceptual analysis of the voice by inexperienced evaluators. Communication distrúrbios , 27(3).
Gamma, A. C. (2015). Visual support of the spectrographic tracing: impact on the reliability of auditory-perceptual analysis of the voice by inexperienced evaluators. Communication Disorders, 27(3).
Helou, L. B., Solomon, N. P., Henry, L. R., Coppit, G. L., Howard,, R. S., & Stojadinovic,
A. (2010). The role of listener experience on Consensus Auditory-perceptual Evaluation of Voice (CAPE-V) ratings of postthyroidectomy voice. Am J Speech Lang Pathol, 248-58.
JM, Bland, & Altman DG. (1986). Statistical method for assessing agreement between two methods of clinical measurement. The Lancet, 327 (8476), 310.
JM, Bland, & Altman DG. (1999). Measuring agreement in method comparison studies. Statistical Methods in Medical Research, 8 (2), 135-160.
Krouwer JS (2008). Why Bland-Altman plots should use X, not (Y+X)/2 when X is a reference method. Statistics in Medicine, 27 (5), 778-780.
Stuck, AK, Bachmann, M., Füllemann, P., Josephson, KR, & Stuck, AE (2020). Effect of testing procedures on gait speed measurement: A systematic review. PloS one, 15 (6), e0234200.
Vieira, M. E. M., Gonçalves, V. C., & STEVAN JUNIOR, S. L. (2015). The importance of technological equipment in high performance sports. 10th Meeting of Engenharia e Tecnologia dos Campos Gerais, Ponta Grossa, 27(3).
Vieira, S. (2023). Sonia vieira. Obtained from http://soniavieira.blogspot.com/: http://soniavieira.blogspot.com/2016/04/analise-de-erros-de-medidas.html
Yeadon, MR, Kato T, & Kerwin DG. (1999). Measuring running speed using photocells. Journal of Sports Sciences, 17(3), 249-257.
How to Cite
Copyright (c) 2023 Ivo Loureiro, Ruben Moreira, Ruben Silva, João Sampaio, Tiago Teixeira, Rodrigo Lourenço, Luís Branquinho, Pedro Flores, Alvaro Fortunato; Pedro Forte
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.